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US 2025/0142262 A1Published application
Loudspeakers and methods of use thereof
AssigneeBrane Audio, LLC
InventorsJoseph F. PINKERTON, David A. BADGER
Life of this patent
Estimating the term…
Abstract
Electroacoustic drivers that can be utilized in loudspeaker systems that utilize drivers having a magnetic negative spring (MNS). A variable volume device, such as a bellow, is used to vary the enclosed air volume of the sealed chamber of the loudspeaker.
Claims36
A loudspeaker comprising:
- (a) a sealed enclosure;
- (b) a sound panel mechanically connected to the sealed enclosure;
- (c) a moveable armature mechanically connected to the sound panel comprising an actuator operable to convert electrical energy into mechanical energy;
- (d) a plurality of ferromagnetic elements mechanically connected to the moveable armature;
- and
- (e) a variable volume device placed within the sealed enclosure that is operable to change resonant frequency of the speaker.
3 more elements
10-12. (canceled)
21-27. (canceled)
31-32. (canceled)
(canceled)
38-39. (canceled)
42-54. (canceled)
A loudspeaker comprising:
- (a) a sealed enclosure;
- (b) a sound panel mechanically connected to the sealed enclosure;
- (c) a moveable armature mechanically connected to the sound panel comprising an actuator operable to convert electrical energy into mechanical energy;
- (d) a pump-valve operable to change the air pressure within the sealed enclosure to change resonant frequency of the loudspeaker;
- (e) a position sensor;
- and
- (f) an electronic controller electrically connected to the position sensor and pump-valve that is operable to move the armature near its centered position.
4 more elements
(canceled)
A loudspeaker comprising:
- (a) a sealed enclosure;
- (b) a sound panel mechanically connected to the sealed enclosure;
- (c) a moveable armature mechanically connected to the sound panel comprising an actuator operable to convert electrical energy into mechanical energy;
- and
- (d) a magnetic negative spring (MNS) comprising (A) a plurality of ferromagnetic elements mechanically connected to the moveable armature, and (B) a stationary core assembly comprising a plurality of stationary ferromagnetic elements;
- wherein
- (i) the sealed enclosure comprises a sealed enclosure boundary on a side opposite the sound panel;
- and
- (ii) the sealed enclosure boundary is anchored to the stationary core assembly;
- and
- (e) a variable volume device placed within the sealed enclosure that is operable to change resonant frequency of the loudspeaker.
8 more elements
(canceled)
Dependencies are inferred from the claim text.